Waste Water Engineering If the depletion of oxygen is found to be 5 ppm after incubating a 2.5% solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is 200 ppm 50 ppm 100 ppm 150 ppm 200 ppm 50 ppm 100 ppm 150 ppm ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering No treatment of the sewage is given if dilution factor is Between 150 to 200 Less than 150 Between 200 to 300 More than 500 Between 150 to 200 Less than 150 Between 200 to 300 More than 500 ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In a trickling filter Biological action is used Both A and B Neither A nor B Filtration process is used Biological action is used Both A and B Neither A nor B Filtration process is used ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Hazen’s formula VS = 418 (GS – Gw)d [(3T + 70)/100] is used for the settlement velocity of the particles of diameter Less than 0.1 mm Less than 0.01 mm Greater than 0.1 mm Less than 0.05 mm Less than 0.1 mm Less than 0.01 mm Greater than 0.1 mm Less than 0.05 mm ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In very first stage of decomposition of the organic matter in sewage Carbondioxide is formed Nitrites are formed Ammonia is formed Nitrates are formed Carbondioxide is formed Nitrites are formed Ammonia is formed Nitrates are formed ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering If the diameter of a sewer is 150 mm, the gradient required for generating self cleansing velocity, is 1 in 100 1 in 120 1 in 60 None of these 1 in 100 1 in 120 1 in 60 None of these ANSWER DOWNLOAD EXAMIANS APP
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